Use PqMsg_* macros in postgres.c.

Commit f4b54e1ed9, which introduced macros for protocol characters,
missed updating a couple of places in postgres.c.

Author: Dave Cramer
Reviewed-by: Fabrízio de Royes Mello
Discussion: https://postgr.es/m/CADK3HHJUVBPoVOmFesPB-fN8_dYt%2BQELV2UB6jxOW2Z40qF-qw%40mail.gmail.com
Backpatch-through: 17

diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 1887b11982cc7f41d5779cbff55beaab5a046187..9cd1d0abe35fb6b0a4044b89e49cfe710bbaaed1 100644 (file)
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -323,7 +323,7 @@ InteractiveBackend(StringInfo inBuf)
                printf("statement: %s\n", inBuf->data);
        fflush(stdout);
 
-       return 'Q';
+       return PqMsg_Query;
 }
 
 /*
@@ -4966,9 +4966,9 @@ PostgresMain(const char *dbname, const char *username)
                                break;
 
                                /*
-                                * 'X' means that the frontend is closing down the socket. EOF
-                                * means unexpected loss of frontend connection. Either way,
-                                * perform normal shutdown.
+                                * PqMsg_Terminate means that the frontend is closing down the
+                                * socket. EOF means unexpected loss of frontend connection.
+                                * Either way, perform normal shutdown.
                                 */
                        case EOF: